diff --git a/GBase.Api/IGBaseObject.cs b/GBase/Interfaces/IGBaseObject.cs
similarity index 71%
rename from GBase.Api/IGBaseObject.cs
rename to GBase/Interfaces/IGBaseObject.cs
index 7319dd8..9a9f095 100644
--- a/GBase.Api/IGBaseObject.cs
+++ b/GBase/Interfaces/IGBaseObject.cs
@@ -2,15 +2,23 @@
 // Created: 2020-02-14
 // Copyright(c) 2020 SimonG. All Rights Reserved.
 
+using System;
 using System.Collections.Generic;
+using GBase.Attributes;
 
-namespace GBase.Api
+namespace GBase.Interfaces
 {
     /// <summary>
     /// GBase object that allows conversion from <see cref="string"/>
     /// </summary>
     public interface IGBaseObject
     {
+        /// <summary>
+        /// <see cref="IGBase"/> Key
+        /// </summary>
+        [GBaseColumn(true)]
+        GBaseKey Key { get; set; }
+        
         /// <summary>
         /// The FileName of the GBase file for an entry of this object
         /// </summary>
@@ -20,8 +28,9 @@ namespace GBase.Api
         /// Initialize this <see cref="IGBaseObject"/> from a given <see cref="string"/>
         /// </summary>
         /// <param name="string">The given <see cref="string"/></param>
+        [Obsolete]
         void InitializeFromString(string @string); //TODO: Try to remove this method, work with keys
 
-        void Initialize(List<object> parameters);
+        void Initialize(GBaseKey key, List<object> parameters);
     }
 }
\ No newline at end of file